1 files changed, 47 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index b316b301152f..fc5a1d642cb5 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -784,8 +784,7 @@ struct radeon_pm_clock_info {
 
 struct radeon_power_state {
         enum radeon_pm_state_type type;
-        /* XXX: use a define for num clock modes */
-        struct radeon_pm_clock_info clock_info[8];
+        struct radeon_pm_clock_info *clock_info;
         /* number of valid clock modes in this power state */
         int num_clock_modes;
         struct radeon_pm_clock_info *default_clock_mode;
@@ -855,6 +854,9 @@ struct radeon_pm {
         struct device           *int_hwmon_dev;
 };
 
+int radeon_pm_get_type_index(struct radeon_device *rdev,
+                             enum radeon_pm_state_type ps_type,
+                             int instance);
 
 /*
  * Benchmarking
@@ -1142,6 +1144,48 @@ struct r600_vram_scratch {
         u64                             gpu_addr;
 };
 
+
+/*
+ * Mutex which allows recursive locking from the same process.
+ */
+struct radeon_mutex {
+        struct mutex            mutex;
+        struct task_struct      *owner;
+        int                     level;
+};
+
+static inline void radeon_mutex_init(struct radeon_mutex *mutex)
+{
+        mutex_init(&mutex->mutex);
+        mutex->owner = NULL;
+        mutex->level = 0;
+}
+
+static inline void radeon_mutex_lock(struct radeon_mutex *mutex)
+{
+        if (mutex_trylock(&mutex->mutex)) {
+                /* The mutex was unlocked before, so it's ours now */
+                mutex->owner = current;
+        } else if (mutex->owner != current) {
+                /* Another process locked the mutex, take it */
+                mutex_lock(&mutex->mutex);
+                mutex->owner = current;
+        }
+        /* Otherwise the mutex was already locked by this process */
+
+        mutex->level++;
+}
+
+static inline void radeon_mutex_unlock(struct radeon_mutex *mutex)
+{
+        if (--mutex->level > 0)
+                return;
+
+        mutex->owner = NULL;
+        mutex_unlock(&mutex->mutex);
+}
+
+
 /*
  * Core structure, functions and helpers.
  */
@@ -1197,7 +1241,7 @@ struct radeon_device {
         struct radeon_gem               gem;
         struct radeon_pm                pm;
         uint32_t                        bios_scratch[RADEON_BIOS_NUM_SCRATCH];
-        struct mutex                    cs_mutex;
+        struct radeon_mutex             cs_mutex;
         struct radeon_wb                wb;
         struct radeon_dummy_page        dummy_page;
         bool                            gpu_lockup;